Computer Science Illuminated
Computer Science Illuminated
6th Edition
ISBN: 9781284055917
Author: Nell Dale, John Lewis
Publisher: Jones & Bartlett Learning
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Chapter 4, Problem 50E

a.

Program Plan Intro

Transistor:

  • A transistor is a device that behaves either as a wire or a resistor depending upon the voltage level of the input signal.
    • If a transistor plays the role of a wire, it conducts electricity.
    • If a transistor plays the role of a resistor, it blocks the flow of electricity.
  • A transistor consists of no moving parts; but can act as a switch.
  • A transistor is made up of a semiconductor material like silicon.
  • A semiconductor material is neither a good conductor of electricity nor a good insulator.

b.

Explanation of Solution

AND gate:

  • An AND gate takes two inputs to produce single output.
  • If both the inputs are 1, then the output is 1. Otherwise, the output is 0.
  • Constructing the AND gate using the transistor is shown below:

c.

Explanation of Solution

NOR gate:

  • A NOR gate takes two inputs to produce single output.
  • If both the inputs are 1, then the output is 0. Otherwise, the output is 1.
  • Constructing the NOR gate using the transistor is shown below:

d.

Explanation of Solution

OR gate:

  • An OR gate takes two inputs to produce single output.
  • If both the inputs are 0, then the output is 0. Otherwise, the output is 1.
  • Constructing the OR gate using the transistor is shown below:

e.

Explanation of Solution

XOR gate:

  • An XOR gate takes two inputs to produce single output.
  • If both the inputs are same, then the output is 0. Otherwise, the output is 1.
  • Constructing the XOR gate using the transistor is shown below:

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